Mosquito Breeding Habitat Source Reduction

One of the most effective ways to control mosquito populations that transmit disease is to reduce the number and types of mosquito breeding habitats in your community. All mosquitoes require a water source to lay their eggs, which in the hottest part of summer can hatch into larvae within a week. To effectively reduce larval hatching, check your property and your neighborhood for the following common potential residential mosquito breeding sites:

Fountains, Birdbaths and Water Gardens

These outdoor reservoirs can provide ideal habitat for breeding mosquitoes. Replace water in birdbaths and fountains at least twice a week. Mosquito larvicides are available at many garden centers for consumer use and can be used in water gardens and fountains without harming other living things. Certain species of goldfish and freshwater minnows that eat mosquito larvae can be used in fountains and water gardens.

In Wisconsin, you need a permit from the Department of Natural Resources (DNR) in order to use larvicides in ponds, lakes, rivers and streams. Contact your nearest DNR service center and ask to speak with the regional aquatic habitat specialist for more information.

Tires

Tires are especially notorious mosquito breeding sites. They should be properly discarded, covered or stacked in a shed or garage so that they cannot fill with water. If you have a tire swing, make a hole in the bottom of it to allow water to drain out.

Flower Pots, Garbage Cans, and Recycling Bins

These are found in every yard, and can hold enough water to breed mosquitoes. Drain dishes under flowerpots every few days and after rainstorms or move them inside.

Cover outdoor trash and recycling cans with tight-fitting lids.

Faucets and Air Conditioners

Remember that they can leak and form puddles that may provide mosquito breeding habitat. Eliminate any standing water in puddles.

Rain Gutters and Spouts

Gutters and downspouts need to be kept clean and maintained. Leaves and other debris can create pools of water and an ideal environment for mosquito larvae.

Animal Watering Troughs

These should be flushed at least twice a week to prevent them from becoming a breeding site.

Leaves and Debris

Clean up leaves and yard debris from low-lying areas to reduce stagnant water pools.

Plastic and Canvas Tarps

These are commonly used to cover log piles, boats, and pools, and they can hold enough water to breed mosquitoes. Make sure water does not collect in tarps used outdoors.

If you have further questions about how to control habitat where mosquitoes can breed or wish to report a site you think may constitute a breeding site for mosquitoes, contact your local public health agency.